He says the Trudeau government's current approach to suspend records rather than expunge them is far from enough to help an estimated 500,000 Canadians carrying past offences.

Earlier this month, the federal government introduced legislation designed to provide no-cost, expedited record suspensions, formerly referred to as pardons, for simple cannabis possession.

Rankin says he has spoken with Liberals and Conservatives who have shown an interest in allowing for expungments, noting U.S. jurisdictions where cannabis is legal are also moving forward with this approach.

A spokesperson for Public Safety Minister Ralph Goodale says the government welcomes "constructive ideas'' from any MP to improve legislation and will consider proposals during the normal parliamentary process.